Navy Lieutenant Max Landry (Michael Ocampo) asks the New Orleans field office for help when he suspects his girlfriend is a spy. Also, Lasalle faces another devastating dead end as he searches for his brother's last known whereabouts.
Sam, Callen and Rountree travel to Afghanistan to help with a sensitive case.
As the trial begins of a Chief Petty Officer who Callen and Sam arrested for war crimes last year, the NCIS team is called to help find the missing star witness.